DISPLAY DEVICE HAVING TOUCH SCREEN THEREIN

• US 20170153746A1
• Filed: 09/27/2016
• Published: 06/01/2017
• Est. Priority Date: 11/30/2015
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: AHN, JungEun, JUNG, BoYoung, YOON, Kyuhan
• Granted Patent: US 10,061,432 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

A display device of the present disclosure includes: an active area having a first region and a second region; a plurality of sub-pixels in the active area; a plurality of touch electrodes arranged in a matrix form and corresponding to the plurality of sub-pixels, wherein at least one of the touch electrodes in the first region has a different size from another of the touch electrodes in the second region.

Claims

1. A display device, comprising:

an active area having a first region and a second region;

a plurality of sub-pixels in the active area;

a plurality of touch electrodes arranged in a matrix form and corresponding to the sub-pixels,

wherein at least one of the touch electrodes in the first region has a different size from another of the touch electrodes in the second region.

2. The display device of claim 1, wherein the number of sub-pixels corresponding to each touch electrode in the first region is larger than the number of sub-pixels corresponding to the touch electrodes in the second region.

3. The display device of claim 2, wherein the sub-pixels are arranged in a matrix form, the number of sub-pixels in the column direction corresponding to each touch electrode in the first region is k+n, the number of sub-pixels in the column direction corresponding to the touch electrodes in the second region is k, and n is a natural number of 1 or 2.

4. The display device of claim 2, further comprising a third region in the active area, and the second region is between the first and third regions.

5. The display device of claim 4, wherein the number of sub-pixels corresponding to each touch electrode in the third region is larger than the number of sub-pixels corresponding to each touch electrode in the second region.

6. The display device of claim 4, wherein the first region is the uppermost region of the active area, the second region is the central region of the active area, and the third region is the lowermost region of the active area.

7. The display device of claim 6, wherein the number of sub-pixels corresponding to each touch electrode in the first, second-and third regions is the same.

8. The display device of claim 4, wherein the number of sub-pixels corresponding to each touch electrode in the first region is the same as the number of sub-pixels corresponding to each touch electrode in the third region.

9. The display device of claim 1, wherein the number of sub-pixels corresponding to each touch electrode in the first region is smaller than the number of sub-pixels corresponding to each touch electrode in the second region.

10. The display device of claim 9, wherein the sub-pixels are arranged in a matrix form, the number of sub-pixels in the column direction corresponding to each touch electrode in the second region is k+n, the number of sub-pixels in the column direction corresponding to each touch electrode in the first region is k, and n is a natural number of 1 or 2.

11. The display device of claim 9, further comprising a third region in the active area, and the second region is between the first and third regions.

12. The display device of claim 11, wherein the number of sub-pixels corresponding to each touch electrode in the third region is larger than the number of sub-pixels corresponding to each touch electrode in the second region.

13. The display device of claim 11, wherein the first region is the uppermost region of the active area, the second region is the central region of the active area, and the third region is the lowermost region of the active area.

14. The display device of claim 13, wherein the number of sub-pixels corresponding to each touch electrode in the first, second and third regions is the same.

15. The display device of claim 11, wherein the number of sub-pixels corresponding to each touch electrode in the first region is the same as the number of sub-pixels corresponding to each touch electrode in the third region.

16. The display device of claim 1, wherein the display device includes one of liquid crystal displays (LCDs), plasma display panels (PDPs), organic light emitting display devices (OLEDs).

17. A display device having a built-in touch screen, comprising:

a plurality of gate lines and data lines vertically crossing each other;

a plurality of sub-pixels where the gate lines and the data lines cross each other;

a plurality of touch electrodes arranged in row and column directions and corresponding to the sub-pixels,

wherein the touch electrodes include first and second touch electrodes, each first touch electrode has an area different from each second touch electrode, the first touch electrodes are arranged at least at the first and last locations in the column direction, so that the first and second touch electrodes are adjacent to each other.

18. The display device of claim 17, wherein the first and second touch electrodes are arranged to adjacent to each other both in the row and column directions except for that the first touch electrodes are arranged at the uppermost row.

19. The display device of claim 17, wherein the number of sub-pixels in the column direction corresponding to each first touch electrode is k+n, the number of sub-pixels in the column direction corresponding to the second touch electrode is k, and n is a natural number of 1 or 2.